Review of Experimental Methods and Numerical Models for Hydraulic Studies in Constructed Wetlands
Sustainability,
Journal Year:
2025,
Volume and Issue:
17(8), P. 3303 - 3303
Published: April 8, 2025
Constructed
wetlands
(CWs)
are
a
sustainable,
nature-based
solution
for
wastewater
treatment,
where
pollutants
removed
through
contact
with
microorganisms
attached
to
substrates
and
plant
roots.
Efficient
hydraulic
performance
is
critical
CWs,
since
poor
can
reduce
treatment
efficiency
by
altering
the
actual
residence
time
relative
design
value.
Two
methods
evaluate
Residence
Time
Distribution
(RTD)
within
CW
system
tracer
method
numerical
modelling.
This
study
provides
comprehensive
review
of
experimental
methodologies
models
used
investigate
processes
in
outlining
available
techniques
assist
researchers
selecting
most
suitable
approach
based
on
their
research
needs
wetland
characteristics.
For
procedures,
this
focuses
selection
tracers,
indicators
assessment,
water
quality
responses
changing
hydrological
conditions.
The
advantages
disadvantages
existing
models,
suitability,
future
direction
also
discussed.
Understanding
these
application
crucial
advancing
our
knowledge
features
CWs
improving
operation.
Ultimately,
appropriate
modelling
supports
sustainable
development
operation
systems
long-term
applications.
Language: Английский
Investigating the Effect of Aeration on Residence Time Distribution of a Baffled Horizontal Subsurface Flow Constructed Wetland
Water,
Journal Year:
2025,
Volume and Issue:
17(8), P. 1175 - 1175
Published: April 15, 2025
Constructed
wetlands
(CWs)
are
cost-effective
and
sustainable
systems
for
wastewater
treatment,
but
their
hydraulic
performance
remains
a
critical
challenge.
In
this
study,
lab-scale
baffled
horizontal
subsurface
flow
constructed
wetland
was
modeled
using
Computational
Fluid
Dynamics
to
investigate
the
effects
of
aeration
strategies
on
performance,
focusing
rates
positions.
A
gas–liquid
two-phase
system
Euler–Euler
approach
with
Darcy–Forchheimer
model
in
OpenFOAM,
simulating
15
cases
varying
(0.1–0.3
m3/day)
positions
(middle
channels
vs.
bends
at
ends
baffles).
Results
show
that
introduction
influenced
efficiency
(HE)
Morrill
Dispersion
Index
(MDI).
Without
aeration,
baseline
HE
already
high
(HE
=
0.9297)
due
optimized
baffle
configuration.
However,
further
improved
increasing
0.9594
MDI
decreasing
from
1.6087
1.4000
when
applied
(Position
C)
0.3
m3/day.
Aeration
more
effective
than
mid-channel
promoting
uniform
distribution
reducing
short-circuiting.
These
findings
highlight
importance
positioning
provide
insights
optimizing
CW
design
balance
energy
consumption
performance.
Language: Английский